Inflation-valve.



No. 766,910. PATENTED AUG. 9, 1904. J. H. SPRAY. INFLATIONVALVE.

APPLICATION FILED MAY 19. 1903.

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alder/mag ,llNiTEn STATES Patented August 9, 1904.

PATENT OFFICE.

JAMES H. SPRAY, OF WATITERBURY, CONNECTICUT, ASSIGNOR TO SCOVILLMANUFACTURING COMPANY, OF WVATERBURY, CONNECTICUT, A COR- PORATION orcoNNEorIouT.

INFLATION-VALVE.

SPECIFICATION forming part of Letters Patent No. 766,910, dated August9, 1904,

Application filed May 19, 1903- Serial No. 157,781. (No model.)

TOW/ZZZ whom it may concern.-

Be it known that I, JAMEs H. SPRAY, a citi* zen of the United States,residing at l/Vaterbury, in the county of New Haven and State ofConnecticut, have invented a certain new and useful Improvement inInflation-Valves, of which the following is a full, clear,and exactdescription.

The object of this invention is to provide an inflation-valve or valveof similar construction with a plunger, plunger-carrier, and springsounited as to be capable of being inserted and withdrawn as a whole; anda further object is to insure the proper seating of the valve un- 5 derspring-pressure.

The invention consists of a plunger-carrier within which the spring isarranged and to both of which the plunger is. applied so that the wholemay be inserted in and withdrawn from the casing as a unit. The springdraws the valve to its seat instead of pushing it as heretofore, and asa result the valve is seated with entire equality of pressure.

In the accompanying drawings, illustrating 5 the invention, in the twofigures of which like parts are similarly designated, Figure 1 is alongitudinal section. Fig. 2 shows in elevation the parts of theinvention detached from one another and from the casing.

3 The casing 1 and the cap 2, having the screw-driver point 3, may be asusual, and the packing in the cap here shown conventionally may also beas usual.

4: is what has hereinbei'ore been referred to as the plunger-carrier.The plunger comprises the valve 5 and a stem 6 of any usual or approvedconstruction. A separate valveseat 7, with an interposed packing-ring 8,is fitted in the end of the plunger-carrier and is 4 held in place byengaging a shoulder on the inside of the casing. The stem of the plungerenters the valve-seat and carrier and projects through a coiled spring9, arranged in said carrier, and the upper end of this coiled spring isprovided with a sleeve 10, somewhat like an eyelet, with theplunger-stem loosely projecting through it and having its upper end 11flattened out to form an enlargement, so as to make a union between thesleeve, spring, and plunger-stem. The spring 9 is set to act by 5expansion, and its lower end rests upon a suitable flange at the bottomof the carrier, while its upper end engages the sleeve or eyelet 10, andthereby normally draws the valve to its seat with a practicallyequally-distributed pressure. The carrier is made as a tube, open at itsupper end, flanged at its lower end to receive the valve-seat, andexternally screwthreaded to engage an internal screw-thread in thecasing to support the connected parts.

The carrier a is provided with the usual nick or slot 12 for cooperationwith the screwdriver point 3 for running the carrier in and out of thecasing 1, and it will be observed that by the arrangement of the springwithin 5 the carrier and its connection with the plungerstem thecarrier, spring, plunger, and valve become practically a unit insertibleand removable at pleasure as such and without danger of loss of any ofthe parts. 7 0

In prior forms of inflation-valves, where a spring was either arrangedloosely in the easing beneath the valve and plunger or connected to themfrom below, such spring was under compression and its pressure was ap-7S plied by pushing the valve onto the valveseat, and the result wasthat any inequality of pressure upon the valve-plunger was applied withshort leverage tending to unequally distribute the pressure upon thevalve-seat. On 30 the other hand, in the present arrangement thespring-pressure tending to keep the valve closed is applied at the upperend of the plunger and thence transmitted tothe valve under a longleverage, with the result that there is 5 a uniform application of thepressure on the valve.

The sleeve 10. as shown in the detail view, Fig. 2, is made with aninterrupted flange or a series of laterally-projecting lugs for en- 9gagement with the upper coil of the spring; but the invention is notlimited to the employment of this particular form of sleeve, and,indeed, the sleeve may be dispensed with and the stem of the plunger beconstructed for direct engagement with the spring, although the use ofthe sleeve is preferred.

/Vhat I claim is 1. In a valve, a casing, a plunger-carrier constructedas a tube adapted to be secured in said casing, an independentvalve-seat fitted in the end of said tube and engaging said casing andthereby held in place, a plunger comfitted in the end of said tube, aWasher inter- 2o posed between said valve-seat and the end of the tube,a shoulder on said casing adapted to be engaged by said valve-seat tohold said valve-seat and Washer in place, a plunger comprising a valveand a stem mounted in said carrier, a spring arranged in said tube andsurrounding said stem, a sleeve engaging the spring and loosely mountedupon the stem, and an enlargement on the stem engaging the sleeve tocause said spring normally to draw the valve to its seat.

In testimony whereof I have hereunto set my hand this 15th day of May,A. D. 1903.

JAMES H. SPRAY.

Witnesses:

G. F. HoDGEs, H. B. RIGGS.

